Wedding Flowers

I am the mother of the groom and I am paying for the flowers for the ceremony and the bridal party. There are 7 bridesmaids, a flower girl, the bride, 3 best men, 5 ushers, and a ring bearer. The hall where the wedding will take place is quite bare, and the chairs are plastic/white. There will be a chuppah, that will also need some flowers. I do not know what to anticipate as the cost for these flowers. It`s hard to get prices on line. If anyone could help me try to plan a budget for the flowers it would be most helpful. When I meet with my to be daughter in law I want to have a fairly good idea of the ballpark cost, so I can set a budget at the onset of the meeting with the florist she has chosen. Please help out with your information. Thanks